Select the equivalent expression to (-3x+6.2y)-(-6x+4.4y) 1. -9x+10.8y

2. 3x+10.8y

3. -9x+1.8y

4. 3x+1.8y
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4. 3x+1.8y

Step-by-step explanation:

(-3x+6.2y)-(-6x+4.4y)=-3x+6.2y+6x-4.4y=3x+1.8y

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

figure c

step-by-step explanation:

hope this .